CN215881215U

CN215881215U - Ultra-precise centering shaft

Info

Publication number: CN215881215U
Application number: CN202121471038.9U
Authority: CN
Inventors: 胡文敏
Original assignee: SICHUAN RENBEN BEARING CO Ltd
Current assignee: SICHUAN RENBEN BEARING CO Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-22
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses an ultra-precision centering shaft which comprises an outer sleeve, a bearing I, a bearing II and a centering shaft, wherein the outer sleeve is in a round table shape, the bearing I and the bearing II are arranged in the outer sleeve, the outer rings of the bearing I and the bearing II are fixed with the outer sleeve, one end of the centering shaft penetrates through the inner rings of the bearing I and the bearing II and is fixed with the inner rings of the bearing I and the bearing II, and the bearing I, the bearing II, the outer sleeve and the centering shaft are concentric. The design of the outer sleeve with the truncated cone shape can be adapted to bearing workpieces with different diameters, and the superfinishing efficiency is effectively improved. The design of duplex bearing in the overcoat provides the stability of centering, has guaranteed the quality of super fine product.

Description

Ultra-precise centering shaft

Technical Field

The utility model relates to bearing processing, in particular to a super-precision centering shaft applied to super-precision of a bearing raceway.

Background

In the production of a bearing as one of basic parts in the mechanical industry, grinding and super-processing of the surface of a raceway is a main link influencing the service life of the bearing, the noise of the bearing and other performances. The prior grinding and super-processing of the bearing raceway comprises the following steps: after the bearing roller path is ground, the bearing roller path is superfinished, wherein superfinishing of the bearing roller path is an important process in the bearing processing process, and the roughness and the roundness of the bearing roller path are improved through the reciprocating motion of the workpiece centering oilstone on the bearing roller path. The existing centering mode adopts ceramics and a press wheel bearing. The bearing inner diameter is scratched when the ceramic is easy to fall, the service life of the pressure wheel bearing is short, and the pressure wheel bearing is frequently replaced.

To the problem that current centering mode exists, chinese utility model patent that patent number is 200920222106.0 discloses a super smart anchor clamps of raceway oilstone in bearing, including centering shaft, bearing, axle sleeve and driving-disc, the center of centering shaft and driving-disc center are on same straight line, the suit bearing on the centering shaft, and the bearing outside meets an axle sleeve, this technical scheme fine solution the problem of bearing internal diameter scotch, but still have the problem in stability and suitability.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model provides the ultra-precision centering shaft which is high in centering stability and can be adapted to different bearing inner diameters.

The technical scheme adopted by the utility model for solving the technical problems is as follows: super smart centering axle, including overcoat, bearing I, bearing II and centering axle, the overcoat is round platform shape, and in bearing I and bearing II arranged the overcoat in, the outer lane and the overcoat of bearing I and bearing II are fixed, and centering axle one end penetrates bearing I and II inner circles of bearing to it is fixed with II inner circles of bearing I and bearing, and bearing I, bearing II, overcoat and centering axle are concentric.

Preferably, a cylinder is arranged on the lower bottom surface of the circular truncated cone of the outer sleeve, the diameter of the cylinder is consistent with that of the lower bottom of the circular truncated cone, and the circular truncated cone and the cylinder are integrally formed.

The use method and the principle of the utility model are as follows: when the centering device is used, the upper bottom of the circular table of the outer sleeve extends into an inner ring of a bearing workpiece to be machined, the centering shaft is moved to enable the outer sleeve to be tightly abutted against the bearing workpiece, the ultra-precision grinding machine is started, the ultra-precision grinding machine drives the bearing workpiece to rotate, and the bearing workpiece drives the outer sleeve to rotate, so that the centering effect is realized.

Compared with the prior art, the utility model has the beneficial effects that:

1. the design of the outer sleeve in a truncated cone shape can be adapted to bearing workpieces with different diameters, so that the superfinishing efficiency is effectively improved;

2. the design of duplex bearing in the overcoat provides the stability of centering, has guaranteed the quality of super fine product.

Drawings

Fig. 1 is a schematic side view cross-sectional structure of the ultra-precision centering shaft of the present invention.

Detailed Description

Embodiment 1, the utility model is further described below with reference to fig. 1, and the ultra-precision centering shaft includes an outer sleeve 1, a bearing i 3, a bearing ii 4, and a centering shaft 2, the outer sleeve is in a circular truncated cone shape, a cylinder is provided on a bottom surface of the circular truncated cone of the outer sleeve, a diameter of the cylinder is identical to a diameter of a bottom of the circular truncated cone, the circular truncated cone and the cylinder are integrally formed, a cavity is provided in the outer sleeve, and a boss is provided, the bearing i and the bearing ii are disposed on the boss in the outer sleeve, the bearing i and the bearing ii are in end-to-end contact, an outer ring of the bearing i and the bearing ii is fixed to the outer sleeve, one end of the centering shaft penetrates through an inner ring of the bearing i and an inner ring of the bearing ii and is fixed to the inner ring of the bearing i and the bearing ii, and the bearing i, the bearing ii, the outer sleeve, and the centering shaft are concentric.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. Super smart centering axle, including overcoat (1), bearing I (3), bearing II (4) and centering axle (2), its characterized in that: the outer sleeve is in a round table shape, the bearing I and the bearing II are arranged in the outer sleeve, the outer rings of the bearing I and the bearing II are fixed with the outer sleeve, one end of the centering shaft penetrates into the inner rings of the bearing I and the bearing II and is fixed with the inner rings of the bearing I and the bearing II, and the bearing I, the bearing II, the outer sleeve and the centering shaft are concentric.

2. The ultraprecision centering shaft according to claim 1, characterized in that: the lower bottom surface of the round platform of the outer sleeve is provided with a cylinder, the diameter of the cylinder is consistent with that of the lower bottom of the round platform, and the round platform and the cylinder are integrally formed.